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/*! \file
    \brief Unit tests for thread-level GEMM
*/

#include "../../common/cutlass_unit_test.h"

#include "cutlass/epilogue/thread/linear_combination.h"

/////////////////////////////////////////////////////////////////////////////////////////////////

TEST(Epilogue_thread_linear_combination, device_side_f16_f32_value) {
    using Element = float;
    using ElementOutput = cutlass::half_t;
    int const kCount = 8;

    using LinearCombination =
            cutlass::epilogue::thread::LinearCombination<ElementOutput, kCount,
                                                         Element, Element>;

    Element alpha = Element(2);
    Element beta = Element(1);

    typename LinearCombination::Params params(alpha, beta);

    LinearCombination linear_combination_op(params);

    cutlass::Array<ElementOutput, kCount> source;
    cutlass::Array<Element, kCount> accum;

    for (int i = 0; i < kCount; ++i) {
        accum[i] = Element(i * 2);
        source[i] = ElementOutput((i * 7 % 9) - 4);
    }

    cutlass::Array<ElementOutput, kCount> destination =
            linear_combination_op(accum, source);

    for (int i = 0; i < kCount; ++i) {
        ElementOutput expected = ElementOutput(
                alpha * accum[i] + beta * Element(ElementOutput(source[i])));

        ElementOutput got = destination[i];

        EXPECT_TRUE(expected == got);
    }
}

/////////////////////////////////////////////////////////////////////////////////////////////////

TEST(Epilogue_thread_linear_combination, device_side_f16_f32_ptr) {
    using Element = float;
    using ElementOutput = cutlass::half_t;
    int const kCount = 8;

    using LinearCombination =
            cutlass::epilogue::thread::LinearCombination<ElementOutput, kCount,
                                                         Element, Element>;

    Element alpha = Element(2);
    Element beta = Element(1);

    typename LinearCombination::Params params(&alpha, &beta);

    LinearCombination linear_combination_op(params);

    cutlass::Array<ElementOutput, kCount> source;
    cutlass::Array<Element, kCount> accum;

    for (int i = 0; i < kCount; ++i) {
        accum[i] = Element(i * 2);
        source[i] = ElementOutput((i * 7 % 9) - 4);
    }

    cutlass::Array<ElementOutput, kCount> destination =
            linear_combination_op(accum, source);

    for (int i = 0; i < kCount; ++i) {
        ElementOutput expected = ElementOutput(
                alpha * accum[i] + beta * Element(ElementOutput(source[i])));

        ElementOutput got = destination[i];

        EXPECT_TRUE(expected == got);
    }
}

/////////////////////////////////////////////////////////////////////////////////////////////////
